Nibe S735 - Electrical Connections; General

General
All electrical equipment, except the outdoor sensors, room
sensors and the outdoor damper, is already connected at
the factory.
• Electrical installation and wiring must be carried out in
accordance with national provisions.
• Disconnect S735 before insulation testing the house wir-
ing.
• If the building is equipped with an RCD, S735 must be
equipped with a separate one.
• S735 must be installed via an isolator switch. The cable
area has to be dimensioned based on the fuse rating used.
• If a miniature circuit breaker is used, this must have at
least triggering characteristic "C". See section "Technical
specifications" for fuse size.
• To prevent interference, sensor cables to external connec-
tions must not be laid close to high voltage cables.
• The minimum area of communication and sensor cables
to external connections must be 0.5 mm² up to 50 m, for
example EKKX, LiYY or equivalent.
• For an electrical wiring diagram for S735, see the "Tech-
nical specifications" section.
• When cable routing in S735, the cable grommets (UB1 and
UB2) must be used.
UB1
UB2
FC1
NOTE
Electrical installation and any servicing must be
carried out under the supervision of a qualified
electrician. Disconnect the current using the cir-
cuit breaker before carrying out any servicing.
NOTE
If the supply cable is damaged, only NIBE, its ser-
vice representative or similar authorised person
may replace it to prevent any danger and damage.
NOTE
Check the connections, main voltage and phase
voltage before the product is started, to prevent
damage to the heat pump electronics.
NOTE
Do not start the system before filling up with wa-
ter. Components in the system could be damaged.
MINIATURE CIRCUIT-BREAKER
The operating circuit in S735 and some of its internal com-
ponents are fused internally by a miniature circuit breaker
(FC1).
21Chapter 5 | Electrical connectionsNIBE S735
Electrical connections